· stability improvements
· fix expansion of playlists stored on the network

This update from Apple will improve the functionality of this app. No new features are included.

· add footer view to album collection to show more metadata
· close playback screen when session ends
· misc. performance and stability improvements
· various smaller UI improvements notably on iOS 9 and 12
· fix crash when enabling CarPlay with very large media libaries
· export smaller snapshots to the Spotlight service to decrease the memory impact
· fix opening very large files from within the Files app